ACDelco 213939 GM Genuine Parts Heated Oxygen Sensor

The ACDelco 213939 is a GM Genuine Parts heated oxygen sensor designed to deliver precise exhaust gas monitoring for optimal engine performance. This original equipment sensor serves as a critical feedback component in your vehicle's exhaust system, measuring the proportion of oxygen in exhaust gases to help the engine control module (ECM) maintain the ideal air/fuel ratio of 14.7:1.

Key Features:

• GM Original Equipment specification with part number cross-reference to OEM 12565397
• Heated sensor element for faster operation and accurate readings in all conditions
• Designed, engineered, and tested to rigorous GM standards
• Waterproof connector protects against moisture, dirt, and debris
• Direct replacement for original equipment on Cadillac, Chevrolet, GMC, and other GM vehicles
• Backed by 12-month/12,000-mile limited warranty

When functioning properly, this oxygen sensor helps optimize engine performance, fuel economy, and emissions control. A faulty O2 sensor can result in decreased fuel efficiency, poor performance, and increased emissions. The ACDelco 213939 meets OBD II standards and provides the exact fit, form, and function required for proper vehicle operation.

This sensor undergoes extensive testing under extreme conditions to ensure durability and long-term reliability. As a true GM Genuine Parts component, it delivers the same performance and service life as the sensor originally installed during vehicle production.